Post-RGB and Post-AGB stars as tracers of binary evolution

Devika Kamath*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


Binary interactions can alter the intrinsic properties of stars (such as: Pulsation, mass-loss, photospheric chemistry, dust-formation, circumstellar envelope morphology etc.) and can even play a dominant role in determining its ultimate fate. While past studies have shown that binarity can end the AGB life of a star, recent studies have revealed that in specific cases binarity also pre-maturely terminate the RGB evolution. A characteristic feature of evolved binaries is the presence of a Keplerian circumbinary disc of gas and dust which plays a lead role in the evolution of the systems. In this article, I will review our advances in the research landscape of post-RGB and post-AGB binary stars, focussing on their observational properties, spectral energy distribution, photospheric chemistry, the evolution of their stable circumbinary discs, and the evolutionary connection between the enigmatic post-AGB/post-RGB binaries, and other systems whose primary component is a white dwarf.

Original languageEnglish
Title of host publicationWhy galaxies care about AGB stars : a continuing challenge through cosmic time
Subtitle of host publicationProceedings of the 343rd Symposium of the International Astronomical Union held In Vienna, Austria 20–23 August, 2018
EditorsFranz Kerschbaum, Martin Groenewegen, Hans Olofsson
Place of PublicationCambridge
PublisherCambridge University Press (CUP)
Number of pages11
ISBN (Print)9781108471527
Publication statusPublished - 30 Dec 2019
Event343rd Symposium of The International Astronomical Union - Vienna, Austria
Duration: 20 Aug 201823 Aug 2018

Publication series

NameProceedings of the International Astronomical Union
PublisherCambridge University Press
ISSN (Print)1743-9213


Conference343rd Symposium of The International Astronomical Union


  • stars: AGB and post-AGB
  • stars: binaries
  • stars: evolution
  • stars: fundamental parameters
  • stars: chemically peculiar
  • Galaxy: stellar content
  • galaxies: Magellanic Clouds


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